qldbgrid 合计怎么写

Question

怎样在qldbgrid 中 最后一行出现合计？
有实例吗？

Answer 1

FieldByName('total').AsFloat:=strtofloat(dbedit1.Text)+
                                                     strtofloat(dbedit2.Text)+
                                                      strtofloat(dbedit3.Text)+
                                                      strtofloat(dbedit4.Text)-
                                                      strtofloat(dbedit5.Text);